Vehicle-nut wrench.



No. 668,693. f Patented Feb. 26, [90L a. E' SPURR.

VEHICLE NUT WRENCH.

(Application filed Oct. 8, 1990.)

(No Model.)

Wit/266365. ink/enter.

WW M W g ei; Q/wm TTED STATES PATENT GFFICE.

GEORGE E. SPURR, OF PORTLAND, MAINE.

VEHICLE-NUT WRENCH.

SPEGIFIGATION forming part of Letters Patent No. 668,693, dated February26, 1901.

Application filed October 3 1900. Serial No. 31,865. (No model.)

I0 all whom it may concern:

Be it known that I, GEORGE E. SPURR, a citizen of the United States,residing at Portland, in the county of Cumberland and State of Maine,have invented certain new and useful'iinprovements in Vehicle-NutWrenches; and I do hereby declare the following to be a full, clear. andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to improvements in vehicle-nut wrenches, andrelates especially to that class of wrenches which may be inserted inthe hub of the wheel and affixed to the axle-nut, so that when the wheelis given a turn in either one direction or the other the nut holding thesame on the axle may be loosened or tightened, as desired.

It further consists of means for adjusting the same, so that it may beinserted in hubs of diiterent interior diameters.

In the drawings herewith accompanying and forming a part of thisapplication, Figure 1 is a side elevation of my improved wrench. Fig. 2is an end elevation of the same, the dotted lines showing a ditferentposition of the gripping-plates when the same have been turned upontheir pivots, so as to adapt them to hubs of different interiordiameters.

bers A and B, substantially in the form of a bell-crank, pivotallyjoined at C, the lower ends of said members forming handles D, the upperends forming clamping-jaws E. Pivotally mounted on the clamping-jaws Eare gripping-plates F, substantially parallelogrammatic in outline. Theobjectin making these plates of this formthat is, with sides ofdifferent lengthsis to enable the wrench to be inserted in hubs ofdifferent interior diameters. When the said plates are turned upon theirpivots G, the longer or shorter side is brought uppermost, so that thealtitude of the plate will correspond to the interior diameter of thewheel-hub and make a comparatively tight fit, so that when the wheel isrevolved the wrench will revolve with it. The handles D are providedwith grooves H, having a seat I in the lower end. Adaptrequired forholding the wheel in place. My improved device consists of two memed tobe inserted between the handles and in such a manner that it may rest inthe grooves H is a spring J, the natural tendency of which is to keepthe handles apart and at the same time force the clamping-jaws andplates against the inner sides of the wheel-hub, so as to cause thewrench to turn with the wheel when so desired.

.The operation of my improved device is as follows: The grip-plates areadjusted on their pivots, so that they may be inserted within the hub ofthe wheel and so that the outer edges of the plates will bear againstthe innor side of the hub and bind. The 'jaws are thus so placed as tostraddle the nut. The wheel is then set in motion, and from the factthat the edges of the plates bear against the inside of the hub of thewheel the nut is unscrewed. To place the nut back upon the axle, theprocess is simply reversed, the wrench remaining in the hub of the wheeland keeping the nut in position when the wheel is removed from the axle.In replacing the nut the danger of twisting the end of the axle bysetting the nut up too tightly is overcome from the fact that the edgesof the gripping-plates bearing against theinner side of the hub do notbind with sufficient force to allow the nut to be set up tighter than isAfter the out has been set up to the required place the hub will revolveon the wrench without setting the nut any tighter.

Having thus described my invention and its use, I claim 1. In avehicle-nut wrench in combination, pivoted members having handles at oneend and clamping-jaws at the other, said clamping-jaws havingparallelogram matic gri ppingplates pivotally attached thereto,substantially as and for the purposes set forth.

2. In a vehicle-nut wrench, in combination, pivoted members havinghandleson one extremity, clamping-jaws on their outer ends,parallelogrammatic grip ping-plates pivotally mounted on saidclamping-jaws and means for normally keeping said jaws apart,substantially as and for the purposes set forth.

3. In a vehicle-nut wrench, in combination, bell-crank-shaped memberspivoted together,

In testimony whereof I affix my signature, in presence of two witnesses,this 29th day of 10 September, 1900.

GEORGE E. SPURR.

Witnesses:

NATHAN CLIFFORD, MARION RICHARDS.

